Diddy -- Wanted for Super Bowl Party Brawl With Loudmouthed Fan

Scottsdale Police want a sit down with Diddy because a disgruntled fan claims the mogul slugged him during a Super Bowl bash -- but video of the incident shows the fan was asking for trouble.

The accuser, Steven Donaldson claims Diddy was slated to host a nightclub party Saturday evening, but didn't show until 1:15 in the morning -- and then, only hung out in VIP ... rarely getting onstage.